4 inch TFT LCD, high density in 480*272 pixels Double track earphone input, built-in speaker 1W, volume adjustable I/O input method style plus pen / software keyboard Built in high sensibility SiRF STAR III GPS receiver module Double antenna: built in ceramic antenna, external antenna Extended SD card containing all necessary programs and maps, navigation software. Support MP3/MP4*? Support AV IN function Double display system, can support LCD and CVBS display at the same time Support the following video format: ASF, AVI, MP4, WMV Support the following audio format: MP3, WAV, MID Support the following pictures browsing: BMP, JPG, PNG, GIF Support the following text reading: TXT Build-in 7.4V Li cell, charged by the external DC 12V power adapter, or the car lighter socket LCD screen darkness automatically adjustment (optional) FM digital modulation function (optional) Host USB1.1 data transfer interface (optional)